- Decomposition:-decayed animals and plant tissue all from soil organic matter. They are acted upon by bacteria, protozoa, and fungi which break them into humus. Humus helps to improve the soil structure and the water retention of the soil.
- Fixation; Nitrogen bacteria fixes nitrogen in air into nitrate’s. This plays a very important role in improving soil fertility.
- Development of soil structure; fungi helps to bind soil particles borrowing animals crate passageways therefore improving soil a creation and soil permeability .
- Man’s activities like ploughing or root penetration in cracks.
- Influence the chemical composition of soil by adding organic acids to the soils.
maurice.mutuku answered the question on November 19, 2019 at 07:52
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State three characteristics of chernozem soils.
(Solved)
State three characteristics of chernozem soils.
Date posted:
November 19, 2019
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Answers (1)
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You carried out a field study on rocks within the school vicinity.
i) State three objectives of your study.
ii) Identify two equipment/tools you used during...
(Solved)
You carried out a field study on rocks within the school vicinity.
i) State three objectives of your study.
ii) Identify two equipment/tools you used during data collection.
iii) Give three reasons why you used fieldwork in studying rocks.
Date posted:
November 19, 2019
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Answers (1)
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Your class carried a study on the lower course of Tana River.
(Solved)
Your class carried a study on the lower course of Tana River.
i) Give two reasons for using sampling as a method of data collection.
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iii) Name three problems you encountered during the field study.
Date posted:
November 19, 2019
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Answers (1)
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Use the diagram below to answer the question that follows.
(Solved)
Use the diagram below to answer the question that follows.
i) What is the process shown above?
ii) Identify the features marked E, F and G.
iii) State three conditions necessary for the development of the above feature.
Date posted:
November 19, 2019
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Answers (1)
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You carried out a field study in an area affected by folding of rocks.
i) Give three reasons why you may not use observation as a...
(Solved)
You carried out a field study in an area affected by folding of rocks.
i) Give three reasons why you may not use observation as a method of data collection.
ii) Apart from observation, identify three activities that you may be involved in during the study.
iii) State three follow up activities that you may carry out after the study.
Date posted:
November 19, 2019
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Answers (1)
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Use the world map below to answer question that follows.
(Solved)
Use the world map below to answer question that follows.
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Date posted:
November 19, 2019
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Answers (1)
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(Solved)
Identify characteristics of a rock pedestal.
Date posted:
November 19, 2019
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Answers (1)
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(Solved)
State three differences between the following seismic waves.
Date posted:
November 19, 2019
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Answers (1)
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The diagram below represents the long shore drift. Use it to answer the question that follows.
(Solved)
The diagram below represents the long shore drift. Use it to answer the question that follows.
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ii) Give two factors which influence the movement of ocean water.
Date posted:
November 19, 2019
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Answers (1)
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Define the term control structure.
(Solved)
Define the term control structure.
Date posted:
November 8, 2019
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Answers (1)
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State three reasons why it is important observe safety precautions and practices in a computer laboratory.
(Solved)
State three reasons why it is important observe safety precautions and practices in a computer laboratory.
Date posted:
November 8, 2019
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Answers (1)
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Differentiate between an electronic spreadsheet and the traditional analysis sheet.
(Solved)
Differentiate between an electronic spreadsheet and the traditional analysis sheet.
Date posted:
November 8, 2019
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Answers (1)
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(Solved)
Differentiate between a drive and a device driver.
Date posted:
November 8, 2019
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Answers (1)
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Explain how the following weathering processes contributes to the formation of soil.
(i) Hydration
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(Solved)
Explain how the following weathering processes contributes to the formation of soil.
(i) Hydration
(ii) Oxidation
Date posted:
November 8, 2019
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Answers (1)
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You are required to carry out a field study on erosional features in glaciated lowland areas.
(Solved)
You are required to carry out a field study on erosional features in glaciated lowland areas.
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Date posted:
November 8, 2019
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Answers (1)
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Describe how the following features are formed: -
(i) Grikes and clints
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(Solved)
Describe how the following features are formed: -
(i) Grikes and clint
(ii) Stalactite
Date posted:
November 8, 2019
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Answers (1)
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Name two areas in Africa associated with karst scenery.
(Solved)
Name two areas in Africa associated with karst scenery.
Date posted:
November 8, 2019
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Answers (1)
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(Solved)
Explain four economic significance of faulting.
Date posted:
November 8, 2019
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Answers (1)
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Study the diagram below and use it to answer the questions below.
(Solved)
Study the diagram below and use it to answer the questions below.
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Date posted:
November 8, 2019
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Answers (1)
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The diagram below represents occurrence of tides.
(Solved)
The diagram below represents occurrence of tides.
Name the parts marked P, Q and R.
Date posted:
November 8, 2019
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Answers (1)